Splitting array of coordinates dependent on the Y value in Python

Question

I have an array of coordinates, and I would like to split the array into two arrays dependent on the Y value when there is a large gap in the Y value. This post: Split an array dependent on the array values in Python does it dependent on the x value, and the method I use is like this:

array = [[1,5],[3,5],[6,7],[8,7],[25,25],[26,50],.....]
n = len(array)
for i in range(n-1): 
    if abs(array[i][0] - array[i+1][0]) >= 10:
       arr1 = array[:i+1]
       arr2 = array[i+1:]

I figured that when I want to split it dependent on the Y value I could just change:

if abs(array[i][0] - array[i+1][0]) to if abs(array[0][i] - array[0][i+1])

This does not work and I get IndexError: list index out of range.

I'm quite new to coding and I'm wondering why this does not work for finding gap in Y value when it works for finding the gap in the X value?

Also, how should I go about splitting the array depending on the Y value?

Any help is much appreciated!

abs(array[i][1] - array[i+1][1]) <<--- mind the indexing

Hng
– Hng

2017-04-05 12:03:57 +00:00
Commented Apr 5, 2017 at 12:03 — Hng
– Hng, Commented Apr 5, 2017 at 12:03

Marco Visibelli · Accepted Answer · 2017-04-05 12:09:35Z

1

you have to switch to this:

array = [[1,5],[3,5],[6,7],[8,7],[25,25],[26,50]]
n = len(array)
for i in range(n-1): 
    if abs(array[i][1] - array[i+1][1]) >= 10:

       arr1 = array[:i+1]
       arr2 = array[i+1:]

answered Apr 5, 2017 at 12:09

Marco Visibelli

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